As you can see, there isn't a lot of grip/frame profile difference between the three handguns. The Crimson Trace Lasergrips on the LCR present the thickest profile of the three. The PM9 offers the shortest height. The grip is usually the most difficult part of a handgun to conceal as it prints more than anything else. The longer the grip, the more of a challenge it is to properly conceal. If you review the dimensions on the 1st page, you'll see there isn't a large amount of difference between them, especially when those are compared to other sub-compact or compact models with double stack magazines.
Volumes of information have been written spawning countless hours of discussion on caliber choice for a conceal carry handgun. I tell people that with whatever cartridge they select, they need to be able to deliver their shots accurately to the target. There is nothing gained by missing with a big bullet. Considering making your caliber selection based on your ability to manage the recoil and hit the target. A great way to do this (without going broke buying a plethora of different handguns) is to spend some $$ at the rental counter of your local range and "test drive" your chosen candidates.
I hope you've enjoyed my ramblings on the topic and if you are out and about
looking for your small and lightweight CCW handgun, good luck in your
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